Linked Questions

25 votes
10 answers
4k views

Time Travel and Judaism

Has time travel ever been discussed before in terms of Judaism? According to Judaism would (should) it be possible to travel through time?
yydl's user avatar
  • 38.6k
15 votes
7 answers
831 views

Plural of "Nafka Minah"

(Inspired by HodofHod's commment here: Four Holy Cities) What is the proper plural for the common Aramaic phrase Nafka Minah נפקא מינה which means something along the line of "practical differences"? ...
Double AA's user avatar
  • 99k
133 votes
4 answers
8k views

Implications of Samoa skipping a Friday

This week, the island of Samoa is switching time zones, causing it to skip from Thursday directly to Saturday. Out of simple curiosity, what implications might this have on any Jews on the island? ...
ESultanik's user avatar
  • 1,381
3 votes
2 answers
317 views

Can you fly from American Samoa on Friday evening to Upolu? (30 minute flight, 24 hour difference)

Firstly I'd like to point out if you Google "Samoa" and "Shabbat" you would find many articles from 2011 that were referring to a time where Samoa changed the day of Saturday, it happened only once ...
arie1985uk's user avatar
3 votes
2 answers
100 views

Is the timing of Mitzvot more intentional or more extentional?

This question is inspired by: Halakhic International Date Line issues I was reading the answers, or actually the source quotations, and realized that the answer to the questions about ...
einpoklum's user avatar
  • 224
2 votes
2 answers
248 views

Why does shabbat start at different times at different places? [closed]

Crossing a time zone does not conjure up a time warp, so how can it be Friday in one place, and Shabbat in another? It just doesn't seem possible.
Adam Mosheh's user avatar
  • 6,011
0 votes
2 answers
59 views

Six month daytime duration

In the Beresheit account of Creation, a day begins at sundown and ends the next day at sundown. But we know closer to each of the Earth's poles, an actual day can last up to six months. The sun rises ...
Ephraim's user avatar
  • 289
16 votes
1 answer
830 views

Time for morning prayer when flying over Greenland and seeing the sun rise twice

Last year I flew from Tel Aviv to Los Angeles. The flight leaves at night (1am) and, in the winter, lands when it is still night (630am). However during the flight, over Greenland, one sees the sun ...
mbloch's user avatar
  • 51.8k
8 votes
1 answer
365 views

Is there any evidence of time-zones in Talmud? (Tanaim and Amoraim only)

There are many verses in the Talmud, Midrash and Siddur that state that the sun and moon rise and set through gates in the firmament. This would imply that there are no time-zones. To this world view ...
Ronen's user avatar
  • 389
8 votes
1 answer
226 views

Call for Halachic Dateline Source(s)

OK, we've got some discussion going on about issues affecting life within the gray zone of the Halachic Dateline and the International Dateline, but what is the original source of such a concept, if ...
Seth J's user avatar
  • 41.6k
7 votes
1 answer
282 views

False portrayal on an anonymous Q&A site

If one posts a question on an anonymous Q&A website there is an assumption that other users either do not, should not, or need not know the identity of the person. Thus all interactions between ...
WAF's user avatar
  • 23.8k
5 votes
1 answer
230 views

Mir Yeshiva and the Dateline

For a short while, the Mir Yeshiva was relocated to Kobe Japan at the outbreak of the Second World War. Since Japan is in question with the International Dateline how did the Rosh Yeshiva Pasken for ...
Bochur613's user avatar
  • 4,657
4 votes
1 answer
73 views

How long does a vow made "until it will be Shavuos" last?

The mishnah in Nedarim 8:3 gives the following general rule: This is the rule: Anything that has a set time and he says, "until it reaches that time," he is forbidden until that time. If he ...
C_D's user avatar
  • 333
2 votes
1 answer
143 views

source for not paskening by tanach?

I recall hearing an idea that we don't pasken by tanach So, a rabbi or judge, nowadays, would pasken by the shulchan aruch and various repsonsa, and I suppose by the talmud. I don't know if the ...
barlop's user avatar
  • 2,117
0 votes
1 answer
346 views

What are the earliest starting and latest ending times for shabbat worldwide utc time?

I am writing an app and I want to block of one feature for the entire world for Shabbat. What would be the earliest time for shabbat to start anywhere in the world during the shortest day of the year?...
Ani Yodea's user avatar
  • 13.2k
0 votes
1 answer
298 views

Shabbos in Tahiti [duplicate]

I have a friend who is interested in going to Tahiti for a weekend. I was wondering if there are any issues with the halachic dateline and if he would have to hold 2 days of shabbos.
MNT's user avatar
  • 371
9 votes
0 answers
221 views

PTIJ: Can we change the liturgy for the day before the clock change? [closed]

The well-known custom for generations in holy congregations in the United States is to conclude services on the last Shabbat that's at least 27 days before Tekufat Nissan with the following formula, ...
Isaac Moses's user avatar
  • 48.1k
5 votes
0 answers
296 views

Holidays south of the equator

When Jews first started establishing communities south of the equator, they must have noticed that the holidays fell completely at the wrong times of the year. (For example, Pesach, referred to as hag ...
Popular Isn't Right's user avatar
4 votes
0 answers
88 views

What if two communities had two different Shabbat days?

Imagine this: One community, A, keeps Shabbat on what we identify as Saturday. However, another community, B, for whatever reason, actually keeps Shabbat on what we identify as Sunday. These two ...
rosenjcb's user avatar
  • 1,584
2 votes
0 answers
88 views

Keeping Two-day Shabbos in the Pacific Islands? [duplicate]

What's this I see about people in the Pacific Islands keeping two days of Shabbos? If it is true: Who, how, since when, and why?
SAH's user avatar
  • 19.8k
0 votes
0 answers
222 views

Israeli travelling in chutz la'aretz on second day Yom Tov (Hawaii)

Is an Israeli allowed to leave Israel motzei chag and arrive in America on what is second day chag in America? The flight would have a stopover in LAX (which I've read isn't an issue), but arriving ...
Elie Steinbock's user avatar